Viruses and Animal Systems

Front

What is a virus?

Back

A virus is a microscopic infectious agent that can only replicate inside the living cells of an organism.

Front

What does it mean for viral entry into host cells to be specific?

Back

It means that viruses can only infect certain types of cells that have specific receptors for the virus.

Front

What is homeostasis?

Back

Homeostasis is the process by which living organisms maintain a stable internal environment despite changes in external conditions.

Front

What happens if the body fails to maintain homeostasis?

Back

Failure to maintain homeostasis can lead to lack of internal balance, difficulty carrying on metabolism, and eventual death.

Front

What are the two main body systems involved in gas exchange?

Back

The respiratory system and the circulatory system.

Front

What is a host in the context of viruses?

Back

A host is an organism or a cell that the virus needs to reproduce in.

Front

What role do red blood cells play in the body?

Back

Red blood cells carry oxygen from the lungs to the cells of the body and return carbon dioxide from the cells back to the lungs.

Front

What is the function of the lungs in the respiratory system?

Back

The lungs facilitate the exchange of oxygen and carbon dioxide between the air and the bloodstream.

Front

What is the feedback loop in body temperature regulation?

Back

A feedback loop in body temperature regulation involves sensors detecting temperature changes and effectors (like sweat glands) responding to maintain a stable temperature.

Front

What is the significance of receptors on host cells for viruses?

Back

Receptors on host cells determine the specificity of viral infection, as viruses attach to these receptors to enter the cells.